On the wway--> GR01 and ER4Ps.I loved the GR07 sound but hated the over the ear application and lack of isolation. I'm totally ok with giving up some punchy bass and similar sound signature with the Gr01s for isolation and straight down wear. I'm going to battle both ER4ps and the Gr01s together to see which one will be my main IEM

I remember the days I would buy the $20 Sony ear buds and the bass would blow out the driver.